Digestive system neurovasculature

Question 1

name the arterial supply of the oesophagus

Answer 1

ascending branches of left gastric artery
thoracic aorta
bronchial arteries

Question 2

the venous drainage of oesophagus

Answer 2

azygos vein
hemi-azygos and accessory hemi-azygos veins
oesophangeal tributaries of the left gastric veins

Question 3

lymphatic drainage of the oesophagus

Answer 3

to the posterior mediastinal and left gastric nodes

Question 4

innervation od the oesophagus comes from branches of ?

Answer 4

vagus and sympathetic trunk

Question 5

Superior striated muscle fibres of oesophagus is innervated by

Answer 5

branchial efferent from the vagus nerves

Question 6

smooth muscles by which nerve

Answer 6

parasympathetic part of autonomic division of peripheral system.

Question 7

Sensory innervation by visceral afferent fibres from

Answer 7

vagus , sympathetic and splanchnic.

Question 8

oesophangeal plexus

Answer 8

Spread of branches from vagus nerves
- Fibres converge to form 2 trunks
Anterior vagal trunk (Mainly left vagus)
- Anterior surface of the oesophagus
Posterior vagal trunk (Mainly right vagus)
- Posterior surface of the oesophagus
Trunks continue through diaphragm to supply the stomach

Question 9

arterial supply of the stomach

Answer 9

a right gastric artery from the proper hepatic artery.

left gastric artery- from the coeliac trunk

a right gastro-omental artery from the gastroduodenal artery

left gastro-omental artery from splanchnic.

Question 10

innervation to stomach

Answer 10

anterior vagal trank from oesophangeal plexus innervates anterior surface of the stomach.

posterior vagal trunk from oesophangeal plexus
innervates the posterior surface of the stomach.

Question 11

arterial supply of the small intestine.

Answer 11

from gastroduodenal artery - supraduodenal artery
- anterior superior pancreaticoduodenal
- posterior superior pancreatoduodenal

from the superior mesenteric artery
- anterior inferior pancreaticoduodenal artery
posterior inferior pancreaticoduodenal artery
- first jejunal branch.

Question 12

Jejunum arterial supply

Answer 12

Does not have prominent arterial arcades and has long vasa recta.

arterial supply includes jejunal arteries from the superior mesenteric artery.

Question 13

Ileum arterial supply

Answer 13

has prominent arterial arcades, more mesenteric. fat and has short vasa recta.

arterial supply includes ileal arteries.-
-from the superior mesenteric artery
-arterial supply also from the ileocolic artery

Where the ileum and the caecum meet.(ileocolic artery). from the superior mesenteric artery

Question 14

Foregut and midgut of the GIT is supplied by?

Answer 14

superior mesenteric artery

Question 15

Hidgut is supplied by

Answer 15

inferior mesenteric trunk.

Question 16

colon ( arteries supply)

Answer 16

ascending colon is supplied by the ileocolic artery branches.
- anterior Anterior caecal artery from ileocolic artery
- Posterior caecal artery from ileocolic artery
AND
Right colic artery from superior mesenteric artery

Question 17

the transverse colon is supplied by ?

Answer 17

midgut/ 2/3 of the transverse colon is supplied by -the right colic artery from the superior mesenteric artery.

rest of the transverse colon is supplied by the middle colic artery from the superior mesenteric

the rest the of the descending and sigmoid intestine is supplied by the left colic and sigmodial artery from the inferior mesenteric artery.

Question 18

Rectum and anal canal (Arterial)

Answer 18

Superior rectal artery
- From the inferior mesenteric artery
Middle rectal artery
- From the internal iliac artery-end as internal pudendal artery
Inferior rectal artery
- From the internal pudendal artery
- From the internal iliac artery

Question 19

venous drainage od the intestine

Answer 19

they all drain via the portal vein.
-tributaries names similar to the arteries.

if the portal vein is blocked then via inferior vena cava.

superior mesenteric Drains straight to portal vein

inferior mesenteric via splanchnic vein then to portal vein

Question 20

The sympathetic innervation of the gastrointestinal system

Answer 20

Abdominal prevertebral plexus surrounds the aorta
- Continuous with major branches.

3 major plexus divisions exist

1. coeliac plexus
   - coeliac and aortorenal ganglion
   -superior mesenteric ganglion
2. Aortic plexus
   -inferior mesenteric ganglion

3 superior hypogastric plexus.